Burnish ing-machine



(No Model.) 3 Sheets--Sheet 1.

H. N. CARPENTER.

BURNISHINGMAGHINE.

No. 406,026. Patented July 2, 1889.

WITNESSESI: INVENTDW 0 W WW I %mdazc (No Model.) 3 SheetsSheet 2.

H. N. CARPENTER. BURNISHING MACHINE.

No. 406,026. Patented July 2, 889.

WI TNESSESII lNvENTflFQ (No Model.) 3 SheetsSheet 3. H. N. CARPENTER.

BURNISHING MACHINE.

N0.'406,0Z6. Patented July 2, 1889.

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UNITED STATES PATENT OFFICE.

HORACE N. CARPENTER, OF SOUTl-IBRIDGE, MASSACHUSETTS.

BURNISHING-IVIACHINE.

SPECIFICATION forming part of Letters Patent No. 406,026, dated July 2, 1889.

Application filed December 8, 1888. Serial No. 293,049. (No model.)

To all whom it may concern.-

Be it known that I, HORACE N. CARPEN- TER, a citizen of the United States, residing at Southbridge, in the county of lVorcester and State of Massachusetts, have invented a new and useful Adjustable Burnishing-Machine, of which the following is a specification.

My invention relates to the burnishing of the frames of eyeglasses and spectacles, and is an improvement on the means heretofore in use. The burnishing of said frames has heretofore been accomplished by hand, the frame being held in one hand and the burnishing-tool rubbed upon it by the other.

The object of my invention is to do this work in a more perfect and rapid manner than was possible with the hand method just mentioned by the use of 1nachinerynamely, by the conjoint use of a bnrnishing-tool fixed in a metal arm, which by belt-power or other power is moved swiftly back and forth through a short distance, and an adjustable spring-rest, by means of which the said frame may be brought against the moving tool with the requisite pressure. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a front elevation of the machine; Fig. 2, a top view with the tank removed; and Fig. 3, a vertical section of a part of the machine on the line A B, Fig. 1, and the line M N, Fig. 2, showing also some parts of the machine lying beyond the section-plane.

Similar letters refer to throughout the several views.

The table or plate 0 O, with its legs 0 a, the pillars P P, and the cylinder Q constitute the frame-work of the machine, and may be best madein one casting. The legs 0 c are fastened to the top of a wooden table similar to that to which the metal part of a sewingmachine is fixed.

IV is only a balance-wheel.

U is a belt-wheel to which the power is applied. Its revolution turns the axle on which both wheels IV and U are hung and on which at G is an eccentric or cam whose displacement or separation of centersis three-eighths of an inch. This imparts to the rod L a similar parts movement back and forth as the wheel and axle revolve, and through the cylinder-joint at Z this motion is communicated to the arm or carriage D, which moves steadily and smoothly between the upper surface of its pillar 1 and the gibs g g, the pressure of which is adj ustcd by means of the screws a a, which work in the cap h. The cap h is held to the pillar Pby the screws 0 O.

In the carriage, D is a round hole, into which is inserted the burnishing-tool T, said tool being made tapering slightly backward, so that when inserted in D it shall fit exactly and firmly at the surface of D. Then the screw 6 is brought solidly against T, and the tool is firmly seated in the carriage .D and moves rapidly back and forth with it. Upon the cap 7L, and held to it by the rod 0", (riv eted to h at the bottom,) is a can or tank 11, from which runs a tube 25, with a faucet f. The tube 6 runs out over the middle of the space traversed by the tool T, so as to drop slowly upon it (T) at about one inch from its free extremity the soap-suds contained in the can II, the mixture being simply pure water and soap or soapine, (the latter being best,) in such proportions as would be used in blowing soapbubbles. The object of this fluid application is to prevent the engendering of hurtful heat in the rapid burnishing, and to improve the quality of the polish obtained, both of which ends it accomplishes perfectly. This portion of the machine is shown only in Fig. 1.

Turning our attention now to the lower part of the mechanism, in the hollow cylinder Q is fitted a collar e' i, Fig. 4:, through the smooth interior of which runs the rod Z) Z), Fig. 4, which is a Vertical solid cylinder holding at the top the rest R, which curves in, as shown in Fig. 4, so as to bring its upper and slightly convex surface (see Fig. 1) directly under the space traversed by the tool T, and parallel with the under edge of said tool. At the lower end of the cylinder 1) I), Fig. 4, it is jointed to the long spring-lever N N, which moves on a fulcrum-joint, at K, a rivet or axle held bylugs q q, screwed to the under side of the table C C. At the farther extremity of the lever N N is a spring 8, of the spiral kind, from which a rod runs to a treadle on. the

floor below the Wooden table on which the whole machine rests. A pressure of the foot on said treadle draws the lever N N down at p. This causes the rod 1) b to move upward, bringing pressure on the spring S and moving the curved rest R, on which is held the spectacle or eyeglass frame F, to be burnished, up toward the vibrating tool T, which is a Wedge-shaped hardened-steel polisher with its edge down. \Vhen the foot-pressure is re moved from the treadle, the spring S pulls the rest R down from the tool T. The springs S s and N N combine to render the bed upon which the frame rests while being polished a Very springy yielding one, thus preventing any breaking, marring, or pressing out of shape. The screw-guide a, Fig. 4, fits in a slot in the front of b I), thus preventing its turning in the collar 1' z.

Having fully described my inventiomwhat I 20 claim, and desire to secure by Letters Patent, 1s-

1. The combination of the curved rest R and the connected spring-lever N, as and for the purpose set forth.

2. The combination of a reciprocating tool T with a movable spring-actuated rest R, substantially as described.

3. The combination of the tool T and means for rapidly reciprocating it with the movable rest R and the lubricating can and tube H and t, to constitute a burnishing-machine, all substantially as set forth.

HORACE N. CARPENTER.

\Vitnesses:

FRANK PARSONS, HENRY T. RICHARDSON. 

